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______  _______structure acts as a median attachment of each lip to the gums.

What caused the Aral sea to dry up?

The process of ____ turns crude oil into the type of products that can be used for cooking, in cars, and other purposes.

The type of biofuel that does not necessitate growing of food crops to produce is

Thalomide, which caused many children to be born with birth defects, is best defined as a(n)

To safeguard against groundwater contamination, sanitary landfills are:

An area of land that seasonally dries up is termed a(n)

The EPA is charged with cleaning up brownfields, which are:

LEED buildings are cheaper to build than conventional buildings.

Which of the following is NOT one of the three major factors that influence climate?